CN213777799U - Light pipe type heat pipe air preheater - Google Patents
Light pipe type heat pipe air preheater Download PDFInfo
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- CN213777799U CN213777799U CN202022761186.6U CN202022761186U CN213777799U CN 213777799 U CN213777799 U CN 213777799U CN 202022761186 U CN202022761186 U CN 202022761186U CN 213777799 U CN213777799 U CN 213777799U
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- air preheater
- preheating system
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The utility model belongs to the technical field of air heater, especially, relate to a fluorescent tube formula heat pipe air heater, including the air heater body, its characterized in that: the air preheater comprises an air preheater body, a primary preheating system, a secondary preheating system, a branch pipeline, a pipeline and a secondary preheating system, wherein the air inlet of the air preheater body is respectively connected with the low-temperature air outlet of the primary preheating system and the secondary preheating system through the branch pipeline, the air outlet of the air preheater body is respectively connected with the preheated air outlet of the primary preheating system and the preheated air outlet of the secondary preheating system through the branch pipeline, and the preheated air outlet of the primary preheating system is connected with the low-temperature air inlet of the secondary preheating system through the pipeline. This air heater passes through two-stage air preheating system, can realize preheating twice to low temperature air, realizes preheating fully to low temperature air.
Description
Technical Field
The utility model belongs to the technical field of air heater, especially, relate to a fluorescent tube formula heat pipe air heater.
Background
The air preheater is a heat exchanger which uses the heat of the exhaust gas of a boiler or other devices to preheat, and has the functions of reducing the temperature of the exhaust gas of the boiler or other devices, improving the heat efficiency, enabling the fuel to easily catch fire, stabilizing the combustion and improving the combustion efficiency. The air preheater can be divided into a pipe box type and a rotary type, wherein the rotary type is divided into a fan cover rotary type and a heating surface rotary type, and the heating surface rotary type is more commonly adopted in boilers. The working principle of the rotary preheater is as follows: the preheater rotor part comprises tens of thousands of heat transfer elements, when the air preheater slowly rotates, flue gas and air reversely and alternately flow through the air preheater, the heat storage element absorbs heat at the flue gas side and releases heat at the air side, and therefore the preheating effects of reducing the exhaust gas temperature of the boiler and improving the hot air temperature are achieved.
When the air preheater in the prior art is used, most of air is subjected to primary heat exchange with high-temperature flue gas in the air preheater, and the preheating effect on the air is limited.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a fluorescent tube formula heat pipe air heater, this air heater pass through two-stage air preheating system, can realize carrying out twice preheating to low temperature air, realize the abundant preheating to low temperature air.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a light pipe formula heat pipe air heater, includes the air heater body, the air inlet of air heater body passes through the lateral conduit and is connected with the low temperature air outlet of primary preheating system, secondary preheating system respectively, the air outlet of air heater body passes through the lateral conduit and is connected with the preheated air outlet of primary preheating system, secondary preheating system respectively, the preheated air outlet of primary preheating system passes through the pipeline and is connected with the low temperature air inlet of secondary preheating system.
Preferably, the primary preheating system comprises a primary preheating fan, and a low-temperature air outlet of the primary preheating fan is connected with an air inlet of the air preheater body through a branch pipeline.
Preferably, the secondary preheating system comprises a secondary preheating fan and a front air preheater, an air outlet of the secondary preheating fan is connected with an air inlet of the front air preheater through a pipeline, and an air outlet of the front air preheater is connected with a low-temperature air inlet of the air preheater body through a pipeline.
Preferably, the pre-air preheater is provided with two: leading air heater of one-level, the leading air heater of second grade, leading air heater of one-level, the leading air heater of second grade establish ties and set up, through setting up two leading air heater, realize the abundant preheating to the air: the air discharged from the primary preheating system is preheated by the primary preposed air preheater to reach 41 ℃, then enters the secondary preposed air preheater to be heated again, and is heated from 41 ℃ to 60 ℃, so that the boundary condition that the low-temperature air inlet temperature of the air preheater is increased by 60 ℃ is realized, and the problem of low-temperature sticking and blocking of the air preheater is solved.
Preferably, the smoke inlet of the primary preposed air preheater is connected with the smoke outlet of the air preheater body through a pipeline, and the air is heated by using the waste heat of the smoke discharged from the air preheater body, so that on one hand, the waste heat can be fully utilized, and on the other hand, the air can be fully preheated.
Preferably, the secondary pre-air preheater is a steam fan heater.
Advantageous effects
The utility model discloses a fluorescent tube formula heat pipe air heater, this air heater pass through two-stage air preheating system, can realize carrying out twice preheating to low temperature air, realize the abundant preheating to low temperature air: (1) firstly, under the action of a primary preheating fan, external low-temperature air enters the air preheater body, exchanges heat with high-temperature flue gas to realize primary preheating, and then is discharged to a preheated air outlet of a primary preheating system from an air outlet of the air preheater body. (2) The air after the primary preheating gets into secondary preheating system under secondary preheating fan's effect, and the air carries out the heat transfer with circulation water media gas cooler exhaust circulating water in leading air heater to realize preheating once more, the air after preheating once more gets into this internal, carries out the heat transfer with the high temperature flue gas and realizes secondary preheating, then discharges the preheated air gas outlet of secondary preheating system from the air gas outlet of air heater body.
Drawings
FIG. 1 is a schematic structural diagram of a light pipe type heat pipe air preheater according to example 1 of the present patent;
FIG. 2 is a schematic structural diagram of a light pipe type heat pipe air preheater according to embodiment 2 of the present patent;
in the figure, 1: an air preheater body; 2: an air inlet of the air preheater body; 3: a low-temperature air outlet of the primary preheating system; 4: a low-temperature air outlet of the secondary preheating system; 5: an air outlet of the air preheater body; 6: a preheated air outlet of the primary preheating system; 7: a preheated air outlet of the secondary preheating system; 8: primary preheating fans; 9: a secondary preheating fan; 10: a primary pre-air preheater; 11: a secondary pre-air preheater; 12: a flue gas inlet of the primary pre-air preheater; 13: a flue gas outlet of the air preheater body; 14: and (4) a valve.
Detailed Description
Hereinafter, the present invention will be described in detail. Before the description is made, it should be understood that the terms used in the present specification and the appended claims should not be construed as limited to general and dictionary meanings, but interpreted based on the meanings and concepts corresponding to technical aspects of the present invention on the basis of the principle that the inventor is allowed to define terms appropriately for the best explanation. Accordingly, the description proposed herein is just a preferable example for the purpose of illustrations only, not intended to limit the scope of the invention, so it should be understood that other equivalents and modifications could be made thereto without departing from the spirit and scope of the invention.
The following examples are given by way of illustration of embodiments of the invention and are not intended to limit the invention, and those skilled in the art will appreciate that modifications within the scope of the invention do not depart from the spirit and scope of the invention.
Example 1
As shown in fig. 1, a light pipe type heat pipe air preheater comprises an air preheater body 1, wherein an air inlet 2 of the air preheater body is respectively connected with low-temperature air outlets 3 and 4 of a primary preheating system and a secondary preheating system through branch pipelines, an air outlet 5 of the air preheater body is respectively connected with preheated air outlets 6 and 7 of the primary preheating system and the secondary preheating system through branch pipelines, and a preheated air outlet 6 of the primary preheating system is connected with a low-temperature air inlet of the secondary preheating system through a pipeline.
The primary preheating system comprises a primary preheating fan 8, and a low-temperature air outlet of the primary preheating fan is connected with an air inlet 2 of the air preheater body through a branch pipeline.
The secondary preheating system comprises a secondary preheating fan 9 and a front air preheater, the air inlet of the secondary preheating fan 9 is connected with the preheated air outlet of the primary preheating system through a pipeline, the air outlet of the secondary preheating fan 9 is connected with the air inlet of the front air preheater through a pipeline, and the air outlet of the front air preheater is connected with the air inlet 2 of the air preheater body through a pipeline.
The leading air heater is provided with two: leading air heater 10 of one-level, leading air heater 11 of second grade, leading air heater of one-level, the leading air heater of second grade establish ties and set up, through setting up two leading air heaters, realize the abundant preheating to the air: the air discharged from the primary preheating system is preheated by the primary preposed air preheater to reach 41 ℃, then enters the secondary preposed air preheater to be heated again, and is heated from 41 ℃ to 60 ℃, so that the boundary condition that the low-temperature air inlet temperature of the air preheater is increased by 60 ℃ is realized, and the problem of low-temperature sticking and blocking of the air preheater is solved.
The second-stage prepositive air preheater is a steam fan heater.
The utility model discloses a set up system, secondary preheating system once, realize the secondary heating to the low temperature air: (1) firstly, opening valves at a low-temperature air outlet and a preheated air outlet of a primary preheating system, closing valves at a low-temperature air outlet and a preheated air outlet of a secondary preheating system, allowing external low-temperature air to enter an air preheater under the action of a primary preheating fan, exchanging heat with high-temperature flue gas to realize primary preheating, and then discharging the air from the air outlet of the air preheater to the preheated air outlet of the primary preheating system. (2) The valve at the low-temperature air outlet of the primary preheating system is closed, the valve at the low-temperature air outlet of the secondary preheating system and the valve at the preheated air outlet are opened, the air after primary preheating enters the secondary preheating system under the action of a secondary preheating fan, the air exchanges heat with the circulating water discharged by the circulating water medium flue gas cooler in the front air preheater, secondary preheating is realized, the air after secondary preheating enters the air preheater, exchanges heat with high-temperature flue gas to realize secondary preheating, and then the air is discharged to the preheated air outlet of the secondary preheating system from the air outlet of the air preheater.
Example 2
As shown in fig. 2, a light pipe type heat pipe air preheater comprises an air preheater body 1, wherein an air inlet 2 of the air preheater body is respectively connected with low-temperature air outlets 3 and 4 of a primary preheating system and a secondary preheating system through branch pipelines, an air outlet 5 of the air preheater body is respectively connected with preheated air outlets 6 and 7 of the primary preheating system and the secondary preheating system through branch pipelines, and a preheated air outlet 6 of the primary preheating system is connected with a low-temperature air inlet of the secondary preheating system through a pipeline.
The primary preheating system comprises a primary preheating fan 8, and a low-temperature air outlet of the primary preheating fan is connected with an air inlet 2 of the air preheater body through a branch pipeline.
The secondary preheating system comprises a secondary preheating fan 9 and a front air preheater, the air inlet of the secondary preheating fan 9 is connected with the preheated air outlet of the primary preheating system through a pipeline, the air outlet of the secondary preheating fan 9 is connected with the air inlet of the front air preheater through a pipeline, and the air outlet of the front air preheater is connected with the air inlet 2 of the air preheater body through a pipeline.
The leading air heater is provided with two: leading air heater 10 of one-level, leading air heater 11 of second grade, leading air heater of one-level, the leading air heater of second grade establish ties and set up, through setting up two leading air heaters, realize the abundant preheating to the air: the air discharged from the primary preheating system is preheated by the primary preposed air preheater to reach 41 ℃, then enters the secondary preposed air preheater to be heated again, and is heated from 41 ℃ to 60 ℃, so that the boundary condition that the low-temperature air inlet temperature of the air preheater is increased by 60 ℃ is realized, and the problem of low-temperature sticking and blocking of the air preheater is solved.
The flue gas inlet 12 of the primary preposed air preheater is connected with the flue gas outlet 13 of the air preheater body through a pipeline, the air is heated by utilizing the flue gas waste heat discharged from the inside of the air preheater body, on one hand, the full utilization of the waste heat can be realized, and on the other hand, the air can be fully preheated.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or that equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention, which is claimed.
Claims (6)
1. A light pipe type heat pipe air preheater comprises an air preheater body and is characterized in that: the air preheater comprises an air preheater body, a primary preheating system, a secondary preheating system, a branch pipeline, a pipeline and a secondary preheating system, wherein the air inlet of the air preheater body is respectively connected with the low-temperature air outlet of the primary preheating system and the secondary preheating system through the branch pipeline, the air outlet of the air preheater body is respectively connected with the preheated air outlet of the primary preheating system and the preheated air outlet of the secondary preheating system through the branch pipeline, and the preheated air outlet of the primary preheating system is connected with the low-temperature air inlet of the secondary preheating system through the pipeline.
2. A light pipe heat pipe air preheater as recited in claim 1, wherein: the primary preheating system comprises a primary preheating fan, and a low-temperature air outlet of the primary preheating fan is connected with an air inlet of the air preheater body through a branch pipeline.
3. A light pipe heat pipe air preheater as recited in claim 2, wherein: the secondary preheating system comprises a secondary preheating fan and a front air preheater, the air outlet of the secondary preheating fan is connected with the air inlet of the front air preheater through a pipeline, and the air outlet of the front air preheater is connected with the air inlet of the front air preheater through a pipeline
The air inlet of the air preheater body is connected.
4. A light pipe heat pipe air preheater as recited in claim 3, wherein: the leading air heater is provided with two: the system comprises a primary preposed air preheater and a secondary preposed air preheater, wherein the primary preposed air preheater and the secondary preposed air preheater are arranged in series.
5. A light pipe heat pipe air preheater as recited in claim 4, wherein: and the smoke inlet of the primary preposed air preheater is connected with the smoke outlet of the air preheater body through a pipeline.
6. A light pipe heat pipe air preheater as recited in claim 5, wherein: the second-stage prepositive air preheater is a steam fan heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022761186.6U CN213777799U (en) | 2020-11-25 | 2020-11-25 | Light pipe type heat pipe air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022761186.6U CN213777799U (en) | 2020-11-25 | 2020-11-25 | Light pipe type heat pipe air preheater |
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| Publication Number | Publication Date |
|---|---|
| CN213777799U true CN213777799U (en) | 2021-07-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022761186.6U Active CN213777799U (en) | 2020-11-25 | 2020-11-25 | Light pipe type heat pipe air preheater |
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| Country | Link |
|---|---|
| CN (1) | CN213777799U (en) |
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2020
- 2020-11-25 CN CN202022761186.6U patent/CN213777799U/en active Active
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